US11466367B2 - Method for manufacturing product with bright surface - Google Patents
Method for manufacturing product with bright surface Download PDFInfo
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- US11466367B2 US11466367B2 US14/427,754 US201314427754A US11466367B2 US 11466367 B2 US11466367 B2 US 11466367B2 US 201314427754 A US201314427754 A US 201314427754A US 11466367 B2 US11466367 B2 US 11466367B2
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- metal film
- substrate
- coat layer
- metal
- island
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1646—Characteristics of the product obtained
- C23C18/165—Multilayered product
- C23C18/1653—Two or more layers with at least one layer obtained by electroless plating and one layer obtained by electroplating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1635—Composition of the substrate
- C23C18/1639—Substrates other than metallic, e.g. inorganic or organic or non-conductive
- C23C18/1641—Organic substrates, e.g. resin, plastic
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1646—Characteristics of the product obtained
- C23C18/165—Multilayered product
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1689—After-treatment
- C23C18/1692—Heat-treatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
- C25D5/505—After-treatment of electroplated surfaces by heat-treatment of electroplated tin coatings, e.g. by melting
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/625—Discontinuous layers, e.g. microcracked layers
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/406—Bright, glossy, shiny surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/08—Cars
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
- C23C18/2026—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by radiant energy
- C23C18/204—Radiation, e.g. UV, laser
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
- C23C18/2046—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by chemical pretreatment
- C23C18/2073—Multistep pretreatment
- C23C18/2086—Multistep pretreatment with use of organic or inorganic compounds other than metals, first
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/285—Sensitising or activating with tin based compound or composition
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/30—Activating or accelerating or sensitising with palladium or other noble metal
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/48—Coating with alloys
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- C—CHEMISTRY; METALLURGY
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- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
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- C—CHEMISTRY; METALLURGY
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- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
Definitions
- the present invention relates to a bright surface product for automobile parts having stress resistance against collisional external force, and a method of manufacturing a bright surface product having surface brightness.
- products having surface brightness as an automotive part having stress resistance against collisional external force such as front grilles, bumper malls, emblems and wheel covers.
- These types of parts can be manufactured, for example, by performing the steps of: forming, if desired, a base coating layer as an underlying coating on the surface of a synthetic resin substrate or a metal substrate; forming a metal thin film on the surface of the base coating layer by sputtering and the like; and forming a translucent top coat layer on the metal thin film, thereby obtaining brightness due to metallic luster of the metal thin film.
- a metal thin film of a bright surface product is generally a continuous film which is usually formed continuously.
- the continuous metal thin film can not follow the deformation of the substrate when external force is applied, and crevices tend to be formed and expanded. This formation and expansion of crevices may cause water to infiltrate from outside, resulting in a rusted metal thin film, and the rust is expanding. This may become responsible for detachment of the metal thin film. Further, in a case where a bright surface product undergoes deformation by collision and the like, a plating film which is detached due to crevice generation may fly out as a sharp tip or edge, resulting in creating an extraordinary dangerous situation against a human body.
- the bright surface product according to Patent Literature 1 has been proposed in order to suppress the aforementioned rust and detachment of a metal thin film as much as possible.
- the bright surface product according to Patent Literature 1 can be obtained by performing the steps of: forming a metal thin film comprising fine metal particles having a thermal expansion coefficient smaller than that of a substrate on a surface of the substrate or a base coat layer on a surface of the substrate by performing a vacuum metallization process such as a sputtering; increasing the temperature of the whole substrate on which the metal thin film is formed to create fine cracks at the metal thin film by thermal expansion; forming a large number of island structures separated from each other with the cracks; forming a top coat layer to surround the large number of island structures and adhere to the surface of the substrate or the base coat layer through the cracks.
- Patent Literature 1 in manufacture of the bright surface product according to Patent Literature 1, large-scale vacuum processing facilities such as vacuum vessels are required in order to perform a vacuum metallization process. Therefore, disadvantageously, the manufacturing cost is expensive, and in particular, a large amount of investment on plant and equipment is required for a large scale production.
- An object of the present invention is to provide a method of manufacturing a bright surface product as an automotive part having stress resistance against collisional external force having good surface brightness and excellent rust and detachment resistance which can be produced in a large scale at low cost, in which further, the formation and expansion of crevices when collisional external force is applied can be prevented to eliminate the possibility of an extraordinary dangerous situation against a human body.
- the method of manufacturing a bright surface product according to the present invention is a method of manufacturing a bright surface product as an automotive part having stress resistance against collisional external force, and is characterized by comprising: a first step of performing electroless plating to form a first metal film on a substrate or a base coat layer deposited on the substrate; a second step of performing electrolytic plating to form at least a second metal film on the above first metal film so that the bonding strength between each film of a multi-layered metal film comprising at least the above first metal film and the above second metal film is higher than the bonding strength between the above substrate or the above base coat layer and the above first metal layer; a third step of integrally and discontinuously segmentalizing the above multi-layered metal film with cracks at the same place by utilizing the difference in internal stress between the above substrate and the above multi-layered metal film to form an island-like metal film comprising a collection of fine multi-layered metal regions with island-like structures and having an appearance of an integrated bright surface; and a fourth step of forming a translucent top
- a bright surface product having good surface brightness can be obtained by forming an island-like metal film having an appearance of an integrated bright surface. Further, an island-like metal film is formed in a fine multi-layered metal region so that a top coat layer covers the fine multi-layered metal region and enters into cracks to make contact with a substrate and a base coat layer. Therefore, the formation and expansion of crevices when external force is applied can be prevented to eliminate the possibility of an extraordinary dangerous situation against a human body, and in addition the adherence of the top coat layer can be improved to obtain a bright surface product having excellent rust and detachment resistance.
- a metal film is formed by electroless plating, electrolytic plating, vacuum processing facilities such as large scale vacuum vessels are not required, allowing a large scale production of bright surface products at low cost.
- a new efficient, low cost and environmentally-friendly manufacturing line for forming an island-like metal film by a wet process can be obtained, contributing to diversification of technologies.
- diversification of texture of surface brightness, properties of an island-like metal film and applicable bright surface products can be achieved by configuring island-like structures in fine multi-layered metal regions.
- a multi-layered metal film is integrally and discontinuously segmentalized, and fine multi-layered metal regions of a first metal film, a second metal film and the like, and cracks can be formed at the same place, and will not be formed at different places. Therefore, the appearance and properties of an island-like metal film can be uniformized, and a top coat layer entering into cracks can be reliably brought into contact with a substrate and a base coat layer.
- the method of manufacturing a bright surface product according to the present invention is characterized in that in the above second step, electrolytic plating is performed to form a third metal film on the above second metal film so that the bonding strength between each film of a multi-layered metal film comprising the above first metal film, the above second metal film and the above third metal film is higher than the bonding strength between the above substrate or the above base coat layer and the above first metal layer; and in the above third step, the above multi-layered metal film is discontinuously segmentalized with the above cracks by utilizing the difference in internal stress between the above substrate and the above multi-layered metal film comprising the above first metal film, the above second metal film and the above third metal film.
- the diversification of the texture of surface brightness, the properties of an island-like metal film and applicable bright surface products can be further achieved by configuring fine multi-layered metal regions comprising an electroless plating metal layer and two electrolytic plating metal layers.
- the method of manufacturing a bright surface product according to the present invention is characterized in that a heat treatment is performed when the above multi-layered metal film is discontinuously segmentalized, and the above multi-layered metal film is discontinuously segmentalized due to the difference in internal stress resulted from the heat treatment, and in addition, the thermal expansion coefficient of the above substrate is 3 times or more than each thermal expansion coefficient of each metal film of the above multi-layered metal film.
- the multi-layered metal film can be reliably and discontinuously segmentalized to form fine multi-layered metal regions separated with cracks can be simply and reliably formed. Further, in a case where the thermal expansion coefficient of a substrate is 3 times or more than each thermal expansion coefficient of each metal film of a multi-layered metal film, cracks relative to the multi-layered metal film can be much more reliably formed at the same place, and therefore, the appearance and properties of an island-like metal film can be uniformized, and a top coat layer entering into the cracks can be reliably brought into contact with the substrate and the base coat layer.
- the method of manufacturing a bright surface product according to the present invention is a method of manufacturing a bright surface product as an automotive part having stress resistance against collisional external force, and is characterized by comprising a first step of performing electroless plating to form a metal film on a substrate or a base coat layer deposited on the substrate; a second step of discontinuously segmentalizing the above metal film with cracks by utilizing the difference in internal stress between the above substrate and the above metal film to form an island-like metal film comprising a collection of fine metal regions with island-like structures and having an appearance of an integrated bright surface; and a third step of forming a translucent top coat layer to cover the above fine multi-layered metal regions of the above island-like metal film and enter into the above cracks to make contact with the above substrate or the above base coat layer.
- a bright surface product having good surface brightness can be obtained by forming an island-like metal film having an appearance of an integrated bright surface. Further, an island-like metal film is formed with fine multi-layered metal regions, a top coat layer covers the fine multi-layered metal regions and enter into cracks to make contact with a substrate and a base coat layer. Therefore, the formation and expansion of crevices when external force is applied can be prevented to eliminate the possibility of an extraordinary dangerous situation against a human body, and in addition the adherence of the top coat layer can be improved to obtain a bright surface product having excellent rust and detachment resistance.
- a metal film is formed by electroless plating, vacuum processing facilities such as large scale vacuum vessels are not required, allowing a large scale production of bright surface products at low cost.
- a new efficient, low cost and environmentally-friendly manufacturing line for forming an island-like metal film by a wet process can be obtained, contributing to diversification of technologies.
- the method of manufacturing a bright surface product according to the present invention is characterized in that the above substrate is of a synthetic resin, or the above substrate and the above base coat layer are of synthetic resins.
- the bonding strength between each film of a multi-layered metal film can be enhanced by utilizing the bonding strength between a substrate or a base coat layer and a first metal layer thereon, and the difference in internal stress can be allowed to easily arise to more simply and reliably perform the formation of cracks in the multi-layered metal film formed on the substrate or the base coat layer.
- the difference in internal stress can be allowed to easily arise to more simply and reliably perform the formation of cracks in the metal film formed on the substrate or the base coat layer.
- the method of manufacturing a bright surface product according to the present invention is characterized in that the widths of the above cracks are 10 nm to 2 ⁇ m.
- the method of manufacturing a bright surface product according to the present invention is characterized in that when the above multi-layered metal film or the above metal film is discontinuously segmentalized, a heat treatment is performed to discontinuously segmentalize the above multi-layered metal film or the above metal film by utilizing the difference in internal stress resulted from the heat treatment.
- the difference in thermal stress due to the difference in thermal expansion coefficients is allowed to be created between a substrate and a metal film or a multi-layered metal film to simply and reliably segmentalize the metal film or the multi-layered metal film discontinuously.
- the method of manufacturing a bright surface product according to the present invention is characterized in that the above bright surface product as an automotive part having stress resistance against collisional external force is a front grille, a bumper mall or a wheel cover.
- a bright surface product having good surface brightness and excellent rust and detachment resistance can be obtained which can be produced in a large scale at low cost, and further, the formation and expansion of crevices when external force is applied can be prevented to eliminate the possibility of an extraordinary dangerous situation against a human body.
- FIG. 1 shows a schematic cross sectional diagram illustrating the flow of the manufacturing steps (a) to (d) in the method of manufacturing a bright surface product according to the first embodiment.
- FIG. 2 shows a schematic cross sectional diagram illustrating the flow of the manufacturing steps (a) to (e) in the method of manufacturing a bright surface product according to the second embodiment.
- FIG. 3 shows a schematic cross sectional diagram illustrating the flow of the manufacturing steps (a) to (f) in the method of manufacturing a bright surface product according to the third embodiment.
- the bright surface product manufactured by the method of manufacturing a bright surface product according to the first embodiment comprises a substrate 11 made of a synthetic resin and the like; a base coat layer 12 made of a synthetic resin and the like deposited on the substrate 11 , if desired; an island-like metal film comprising a collection of fine metal regions 14 with island-like structures which is formed on the base coat layer 12 or the substrate 11 by electroless plating; and a top coat layer 16 with translucency covering the fine metal regions 14 of island-like metal film as shown in FIG. 1 ( d ) .
- the substrate 11 can be any appropriate material within the scope of the spirit of the present invention, and various materials such as resins, metals, ceramics, paper and glass can be used.
- appropriate materials applicable in a case where the substrate 11 is of a synthetic resin include ABS (acrylonitrile-butadiene-styrene) resin, AES (acrylonitrile-ethylene-styrene) resin, acrylic resin, polyacetal resin, polyamide resin, polyamidoimide resin, polyimide resin, polyurethane resin, polyester resin, polyethylene resin, polyethylene naphthalate resin, polyether sulphone, polyether ether ketone, liquid crystal polymer (LCP), polyvinyl chloride resin, polyolefin resin such as polypropylene, polycarbonate resin, polystyrene resin, polysulfone resin, cellulose resin, polyphenylene sulfide resin and the like.
- ABS acrylonitrile-butadiene-styrene
- AES acrylonitrile
- the substrate 11 is a metal
- appropriate materials applicable in a case where the substrate 11 is a metal include iron, aluminum and the like.
- the form of the substrate 11 there is no particular limitation for the form of the substrate 11 , and it can be a plate material, a sheet material, a film material, a predetermined solid form and the like.
- the base coat layer 12 is provided on the substrate 11 if desired, for example, to improve the adherence of the fine metal region 14 and the topcoat layer 16 .
- the base coat layer 12 is preferably an organic coating film made of a hydrophilic resin material because metal particles having a catalytic activity are adsorbed or adhered to facilitate formation of a uniform catalyst layer even when the surface of the substrate 11 is smooth.
- a metal film 13 described below obtained by deposition-substituting the uniform catalyst layer will show good adherence.
- hydrophilic resin material for example, used are an acrylic resin, a water-insoluble polyester resin, a resin and an isocyanate based compound having a hydroxy group, a hydrophilic and/or water soluble resin having a hydroxy group and the like.
- the hydrophilic resin material is preferably water-insoluble, and in a case where it is water-soluble, it is preferably converted to be water-insoluble by performing a hardening treatment and the like.
- an ultraviolet irradiation may be performed on the surface of the substrate 11 under the atmosphere to form a modified layer on the surface, and electroless plating may be performed on the modified layer to form an island-like metal film comprising a collection of the fine metal regions 14 with island-like structures.
- the fine metal regions 14 with island-like structures are formed by electroless plating described below and segmentalization due to the difference in internal stress, and an island-like metal film comprises a collection of the fine metal regions 14 with island-like structures separated with cracks 15 , and has an appearance of an integrated bright surface.
- the island-like metal film comprising the fine metal regions 14 or a collection thereof can be formed with an appropriate metal which can be deposited by electroless plating, but preferred are, for example, nickel or a nickel alloy, palladium or a palladium alloy, tin or a tin alloy, copper or a copper alloy, silver or a silver alloy, gold or a gold alloy, cobalt or a cobalt alloy and the like.
- the mean maximum width of the fine metal regions 14 (the longest distance between edges when a distance from one edge to the other of the fine metal region 14 to be measured, or a diameter obtained by computing a diameter of a circle having the same area as the fine metal region 14 by using an image processing system and the like) is, for example, around 20 ⁇ m. Further, in a case where the width of the crack 15 is too small, the entrance and adhesion of the top coat layer 16 into the cracks 15 is difficult to be achieved. In a case where it is too large, the appearance of an integrated bright surface is difficult to be achieved. Therefore, the width is preferably 10 nm to 2 ⁇ m, more preferably 30 nm to 500 nm.
- the top coat layer 16 with translucency is formed to cover the fine metal regions 14 of the island-like metal film and enter into the cracks 15 to make contact with the base coat layer 12 or the substrate 11 .
- the top coat layer 16 is formed, for example, with silicone acrylic resin, acryl urethane resin, urethane resin and the like.
- the base coat layer 12 is deposited, if desired, on the substrate 11 as shown in FIG. 1 ( a ) .
- the base coat layer 12 is formed, for example, by providing and drying an organic coating material such as an acrylic urethane based coating material on the substrate 11 by application or immersion.
- an ultraviolet irradiation may be performed on the surface of the substrate 11 under the atmosphere to form a modified layer on the surface, and the metal film 13 described below may be formed by electroless plating.
- the metal film 13 can be formed with an appropriate metal which can be deposited by electroless plating.
- the followings can be used: nickel or a nickel alloy, palladium or a palladium alloy, tin or a tin alloy, copper or a copper alloy, silver or a silver alloy, gold or a gold alloy, cobalt or a cobalt alloy and the like. Note that in a case where the base coat layer 12 is not provided on the substrate 11 , electroless plating is performed to directly form the metal film 13 on the substrate 11 .
- the metal film 13 can be formed by conventional procedures such as those comprising immersing the substrate 11 having the base coat layer 12 or the substrate 11 in a tin-palladium mixed catalyst solution which is generally called a catalyst solution, and washing with water, and then immersing in an accelerator (a promoter) comprising 5 vol % to 10 vol % of sulfuric acid or hydrochloric acid to deposit a metal using palladium adsorbed on the surface as a catalyst.
- an accelerator a promoter
- the immersion time into an electroless plating bath is preferably more than 10 seconds in order to form the metal film 13 as a continuation film.
- electroless plating baths known electroless plating baths containing salts of a metal (including an alloy) to be deposited on the surface of the base coat layer 12 or the substrate 11 , a reducing agent and the like can be used.
- a pre-treatment such as a cleaning treatment such as a degreasing treatment by acid/alkali wash and the like, a conditioning treatment and a pre-dipping treatment with a commercially available chemical liquid and the like.
- a pre-treatment such as surface roughening of the surface of the substrate 11 may be performed by mechanical, chemical or optical treatments (UV treatments, plasma treatments and the like).
- the metal film 13 is discontinuously segmentalized with the cracks 15 to form an island-like metal film comprising a collection of the fine metal regions 14 with island-like structures and having an appearance of an integrated bright surface.
- This segmentalization of the metal film 13 due to the difference in internal stress may be due to, for example, the difference in internal stress between the substrate 11 and the metal film 13 which is produced during a heat treatment at 80° C. or more and the like, or the difference in internal stress between the substrate 11 and the metal film 13 which remains in a state where they are removed from an electroless plating bath.
- the base coat layer 12 since the thickness of the base coat layer 12 is thinner by an order of magnitude than that of the substrate 11 , the influence from the internal stress in the base coat layer 12 is small, and thus, the metal film 13 will be segmentalized with the cracks 15 due to the difference in internal stress between the substrate 11 and the metal film 13 .
- the thermal expansion coefficient of the substrate 11 is preferably larger than that of the metal film 13 so that the difference in thermal stress between the substrate 11 and the metal film 13 can be created due to the difference in thermal expansion coefficients when a heat treatment is performed. Then the metal film 13 can be discontinuously segmentalized in a simple and reliable fashion.
- the thermal expansion coefficient of the substrate 11 is 3 times or more, more preferably 4 times or more than that of the metal film 13 because the fine metal regions 14 separated and isolated with the cracks 15 can be more reliably formed.
- the thermal expansion coefficient of the substrate 11 is preferably larger than that of the metal film 13 , and the thermal expansion coefficient of the substrate 11 is preferably 3 times or more, more preferably 4 times or higher than that of the metal film 13 so that the fine metal regions 14 separated and isolated with the cracks 15 can be more reliably formed as well.
- the top coat layer 16 with translucency is formed so as to cover the fine metal regions 14 of the island-like metal film and enter into the cracks 15 to make contact with the base coat layer 12 or the substrate 11 .
- the top coat layer 16 is formed, for example, by providing and drying a top coat material such as silicone acrylic resin, acryl urethane resin and urethane resin by application or immersion. This allows the top coat layer 16 to cover each of the fine metal regions 14 and enter into the cracks 15 to closely adhere to the base coat layer 12 or the substrate 11 .
- a bright surface product having good surface brightness can be obtained by forming an island-like metal film having an appearance of an integrated bright surface. Further, an island-like metal film is formed with the fine metal regions 14 so that the top coat layer 16 covers the fine metal regions 14 and enters into the cracks 15 to make contact with the base coat layer 12 and the substrate 11 . Therefore, the formation and expansion of crevices when external force is applied can be prevented to eliminate the possibility of an extraordinary dangerous situation against a human body, and in addition the adherence of the top coat layer 16 can be improved to obtain a bright surface product having excellent rust and detachment resistance.
- the metal film. 13 is formed by electroless plating, large scale vacuum treating facilities such as vacuum vessels are not required, allowing a large scale production of a bright surface product at low cost.
- island-like metal films of various metals such as nickel or a nickel alloy can be obtained, and the properties of these various metals can be used effectively.
- the substrate 11 is of a synthetic resin, or the substrate 11 and the base coat layer 12 are of synthetic resins, the difference in internal stress may be allowed to easily arise to form the cracks 15 in the metal film 13 more simply and reliably.
- the bright surface product as an automotive part having stress resistance against collisional external force manufactured by the method of manufacturing a bright surface product according to the second embodiment comprises a substrate 21 made of a synthetic resin and the like, a base coat layer 22 made of a synthetic resin and the like deposited on the substrates 21 if desired, an island-like metal film formed on the base coat layer 22 or the substrate 21 comprising fine multi-layered metal regions 25 with island-like structures and a top coat layer 27 with translucency covering the fine multi-layered metal regions 25 of the island-like metal film.
- the fine multi-layered metal region 25 comprises a first metal layer 251 formed on the base coat layer 22 or the substrate 21 by electroless plating and a second metal layer 252 formed on the first metal layer 251 by electrolytic plating.
- the substrate 21 and the base coat layer 22 provided on the substrate 21 if desired are fundamentally the same as the substrate 11 and the base coat layer 12 according to the first embodiment.
- the island-like metal film comprising a collection of the fine multi-layered metal regions 25 with island-like structures is directly formed on the substrate 21 , and the top coat layer 27 with translucency described below is formed to cover the fine multi-layered metal regions 25 of the island-like metal film and enter into the cracks 26 to make contact with the substrate 21 .
- an ultraviolet irradiation may be performed on the surface of the substrate 21 under the atmosphere to form a modified layer on the surface in order to improve the adhesion of electroless plating, and an island-like metal film comprising a collection of the fine multi-layered metal regions 25 with island-like structures described below may be formed on the modified layer by electroless plating.
- the fine multi-layered metal region 25 with an island-like structure forms a first metal film 23 by electroless plating and a second metal film 24 by electrolytic plating as described below, and is formed by segmentalization due to the difference in internal stress.
- the fine multi-layered metal region 25 is configured such that the first metal layer 251 by electroless plating and the second metal layer 252 by electrolytic plating are layered.
- the island-like metal film thereof comprises a collection of the fine multi-layered metal regions 25 with island-like structures separated with the cracks 26 , and has an appearance of an integrated bright surface.
- the first metal layer 251 or the first metal film 23 may be formed with an appropriate metal which can be deposited by electroless plating.
- an appropriate metal which can be deposited by electroless plating.
- the second metal layer 252 or the second metal film 24 may be formed with an appropriate metal.
- the mean maximum width (the longest distance between edges when a distance from one edge to the other of the fine multi-layered metal region 25 to be measured, or a diameter obtained by computing a diameter of a circle having the same area as the fine multi-layered metal region 25 by using an image processing system and the like) is, for example, around 20 ⁇ m. Further, in a case where the width of the crack 26 is too small, the entrance and adhesion of the top coat layer 27 into and on the crack 26 is difficult to be achieved. In a case where it is too large, the appearance of an integrated bright surface is difficult to be achieved. Therefore, the width is preferably 10 nm to 2 ⁇ m, more preferably 30 nm to 500 nm.
- the top coat layer 27 with translucency is formed to cover the fine multi-layered metal regions 25 of the island-like metal film and enter into the cracks 26 to make contact with the base coat layer 22 or the substrate 21 .
- the top coat layer 27 is formed with, for example, silicone acrylic resin, acryl urethane resin, urethane resin and the like.
- the base coat layer 22 is deposited on the substrate 21 if desired, and electroless plating is performed to form the first metal film 23 as a continuous film on the base coat layer 22 deposited on the substrate 21 or the substrate 21 .
- Procedures for formation of the base coat layer 22 and formation of the first metal film 23 are similar to those for formation of the base coat layer 12 and formation of the metal film 13 according to the first embodiment.
- the substrate 21 is of a synthetic resin
- an ultraviolet irradiation may be performed on the surface of the substrate 21 under the atmosphere to forma modified layer on the surface, and the first metal film 23 may be formed thereon by electroless plating.
- electrolytic plating is performed on the first metal film 23 to form the second metal film 24 as a continuous film comprising the same or different type of a metal as the first metal film 23 so that the bonding strength between each film of the multi-layered metal film comprising the first metal film 23 and the second metal film 24 becomes larger than the bonding strength between the base coat layer 22 or the substrate 21 and the first metal film 23 . That is, for the base coat layer 22 or the substrate 21 , those can be used in which the bonding strength with the first metal film 23 is weaker than that between each film of the multi-layered metal film.
- the substrate 21 made of a synthetic resin and the base coat layer 22 as an organic coating film of a synthetic resin may be used such that the bonding strength between each film of the multi-layered metal film to be metal-bonded becomes much stronger than that with the base coat layer 22 or the substrate 21 and the first metal film 23 .
- the second metal film 24 is formed, for example with electrolytic plating bath of chromium or a chromium alloy and the like.
- the multi-layered metal film is discontinuously and integrally segmentalized with the cracks 26 to form an island-like metal film comprising a collection of the fine multi-layered metal regions 25 with island-like structures and having an appearance of an integrated bright surface.
- This segmentalization of the multi-layered metal film due to the difference in internal stress may be due to, for example, the difference in internal stress between the substrate 21 and the multi-layered metal film which is produced during a heat treatment at 80° C.
- the base coat layer 22 since the thickness of the base coat layer 22 is thinner by an order of magnitude than that of the substrate 21 , the influence from the internal stress in the base coat layer 22 is small, and thus, the multi-layered metal film will be segmentalized with the cracks 26 due to the difference in internal stress between the substrate 21 and the metal films 23 , 24 or the first metal film 23 .
- the thermal expansion coefficient of the substrate 21 is preferably larger than that of the first metal film 23 so that the difference in thermal stress between the substrate 21 and the multi-layered metal film or the first metal film 23 can be created due to the difference in thermal expansion coefficients when a heat treatment is performed. Then the multi-layered metal film can be discontinuously segmentalized in a simple and reliable fashion.
- a thermal expansion coefficient of the substrate 21 more than each thermal expansion coefficient of each of the metal films 23 , 24 of the multi-layered metal film by 3 times or more, more preferably by 4 times or more is further preferred because the cracks 26 relative to the multi-layered metal film, i.e., the cracks 26 relative to the first metal film 23 and the second metal film 24 can be formed at the same place in a more reliable fashion such that the fine multi-layered metal regions 25 separated and isolated with the cracks 26 can be more reliably formed, and in addition the appearance and properties of an island-like metal film can be uniformized, and the top coat layer 27 described below entering into the crack 26 can be reliably brought into contact with the base coat layer 22 and the substrate 21 .
- the thermal expansion coefficient of the substrate 21 is preferably larger than each thermal expansion coefficient of each of the metal films 23 , 24 or the thermal expansion coefficient of the first metal film 23 , and the thermal expansion coefficient of the substrate 21 is preferably 3 times or more, more preferably 4 times or more than each thermal expansion coefficient of each of the metal films 23 , 24 such that the fine multi-layered metal regions 25 separated with the cracks 26 can be reliably formed.
- the top coat layer 27 with translucency is formed so as to cover the fine multi-layered metal regions 25 of the island-like metal film and enter into the cracks 26 to make contact with the base coat layer 22 or the substrate 21 .
- the top coat layer 27 is formed as in the top coat layer 16 according to the first embodiment to cover each of the fine multi-layered metal regions 25 and enter into the cracks 26 to closely adhere to the base coat layer 22 or the substrate 21 .
- a bright surface product having good surface brightness can be obtained by forming an island-like metal film having an appearance of an integrated bright surface. Further, an island-like metal film is formed with the fine metal regions 25 , and the top coat layer 27 covers the fine multi-layered metal regions 25 and enters into the cracks 26 to make contact with the base coat layer 22 and the substrate 21 . Therefore, the formation and expansion of crevices when external force is applied can be prevented to eliminate the possibility of an extraordinary dangerous situation against a human body, and in addition the adherence of the top coat layer 27 can be improved to obtain a bright surface product having excellent rust and detachment resistance.
- the metal films 23 , 24 are formed by electroless plating, electrolytic plating, large scale vacuum treating facilities such as vacuum vessels are not required, allowing a large scale production of a bright surface product at low cost.
- the diversification of the texture of surface brightness, the properties of an island-like metal film and applicable bright surface products can be achieved by configuring island-like structures in fine multi-layered metal regions 25 .
- a multi-layered metal film is integrally and discontinuously segmentalized, and the fine multi-layered metal regions 25 of the first metal film 23 and the second metal film 24 and the cracks 26 can be formed at the same place, and will not be formed at different places. Therefore, the appearance and properties of an island-like metal film can be uniformized, and a top coat layer entering into the cracks 26 can be reliably brought into contact with the base coat layer 22 and the substrate 21 .
- the bonding strength between each film of a multi-layered metal film can be enhanced due to the bonding strength between these and the first metal layer 23 , and the difference in internal stress can be allowed to be easily arise to more simply and reliably form cracks in the multi-layered metal film.
- the bright surface product manufactured by the method of manufacturing a bright surface product according to the third embodiment comprises a substrate 31 made of a synthetic resin and the like, a base coat layer 32 made of a synthetic resin and the like deposited on the substrate 31 if desired, an island-like metal film formed on the base coat layer 32 or the substrate 31 comprising fine multi-layered metal regions 36 with island-like structures and a top coat layer 38 with translucency covering the fine multi-layered metal regions 36 of the island-like metal film.
- the fine multi-layered metal region 36 comprises a first metal layer 361 formed on the base coat layer 32 or the substrate 31 by electroless plating, a second metal layer 362 formed on the first metal layer 361 by electrolytic plating and a third metal layer 363 formed on the second metal layer 362 by electrolytic plating.
- the substrate 31 and the base coat layer 32 provided on the substrate 31 if desired are fundamentally the same as the substrates 11 , 21 and the base coat layers 12 , 22 according to the first and second embodiments.
- an island-like metal film comprising a collection of the fine multi-layered metal regions 36 with island-like structures may be directly formed on the substrate 31 , and the top coat layer 38 with translucency described below is formed to cover the fine multi-layered metal regions 36 of the island-like metal film and enter into the cracks 37 to make contact with the substrate 31 .
- an ultraviolet irradiation may be performed on the surface of the substrate 31 under the atmosphere to form a modified layer on the surface in order to improve the adhesion of electroless plating, and an island-like metal film comprising a collection of the fine multi-layered metal regions 36 with island-like structures described below may be formed on the modified layer by performing electroless plating.
- the fine multi-layered metal region 36 with an island-like structure forms a first metal film 33 by electroless plating, a second metal film 34 and a third metal film 35 by electrolytic plating as described below, and is formed by segmentalization due to the difference in internal stress.
- the fine multi-layered metal region 36 is configured such that the first metal layer 361 by electroless plating, the second metal layer 362 and the third metal layer 363 by electrolytic plating are layered.
- the island-like metal film thereof comprises a collection of the fine multi-layered metal regions 36 with island-like structures separated with the cracks 37 , and has an appearance of an integrated bright surface.
- the first metal layer 361 or the first metal film 33 may be formed with an appropriate metal which can be deposited by electroless plating.
- an appropriate metal which can be deposited by electroless plating.
- the second metal layer 362 or the second metal film 34 can be formed with an appropriate metal.
- the third metal layer 363 or the third metal film 35 can be formed with an appropriate metal.
- the mean maximum width of the fine multi-layered metal regions 36 is, for example, around 5 ⁇ m.
- the width of the crack 37 is preferably 10 nm to 2 ⁇ m, more preferably 30 nm to 500 nm.
- the top coat layer 38 with translucency is formed to cover the fine multi-layered metal regions 36 of the island-like metal film and enter into the cracks 37 to make contact with the base coat layer 32 or the substrate 31 .
- the top coat layer 38 is formed with, for example, silicone acrylic resin, acryl urethane resin, urethane resin and the like.
- the base coat layer 32 is deposited on the substrate 31 if desired, and electroless plating is performed to form the first metal film 33 as a continuous film on the base coat layer 32 deposited on the substrate 31 or the substrate 31 .
- Procedures for formation of the base coat layer 32 and formation of the first metal film 33 are similar to those for formation of the base coat layers 12 , 22 and formation of the metal film 13 and the first metal film 23 according to the first and second embodiments.
- the substrate 31 is of a synthetic resin
- an ultraviolet irradiation may be performed on the surface of the substrate 31 under the atmosphere to form a modified layer on the surface, and the first metal film 33 may be formed thereon by electroless plating.
- electrolytic plating is performed on the first metal film 33 to form the second metal film 34 as a continuous film comprising the same or different type of a metal as the first metal film 33
- electrolytic plating is further performed on the second metal film 34 to form the third metal film 35 as a continuous film comprising the same or different type of a metal as the first metal film 33 or the second metal film 34 so that the bonding strength between each film of the multi-layered metal film comprising the first metal film 33 , the second metal film 34 and the third metal film 35 becomes larger than the bonding strength between the base coat layer 32 or the substrate 31 and the first metal film 33 .
- the base coat layer 32 and the substrate 31 those can be used in which the bonding strength with the first metal film 33 is weaker than that between each film of the multi-layered metal film.
- the substrate 31 made of a synthetic resin and the base coat layer 32 made of an organic coating film of a synthetic resin may be used such that the bonding strength between each film of the multi-layered metal film to be metal-bonded becomes much stronger than that with the base coat layer 32 or the substrate 31 and the first metal film 33 .
- the multi-layered metal film is discontinuously and integrally segmentalized with the cracks 37 to form an island-like metal film comprising a collection of the fine multi-layered metal regions 36 with island-like structures and having an appearance of an integrated bright surface.
- This segmentalization of the multi-layered metal film due to the difference in internal stress may be due to, for example, the difference in internal stress between the substrate 31 and the multi-layered metal film which is produced during a heat treatment at 80° C.
- the thickness of the base coat layer 32 is thinner by an order of magnitude than that of the substrate 31 , the influence from the internal stress in the base coat layer 32 is small, and thus, the multi-layered metal film will be segmentalized with the cracks 37 due to the difference in internal stress between the substrate 31 and the metal films 33 , 34 , 35 or the first metal film 33 .
- the thermal expansion coefficient of the substrate 31 is preferably larger than that of the first metal film 33 so that the difference in thermal stress between the substrate 31 and the multi-layered metal film or the metal film 33 resulted from the difference in thermal expansion coefficients can be created when a heat treatment is performed. Then the multi-layered metal film can be discontinuously segmentalized in a simple and reliable fashion.
- a thermal expansion coefficient of the substrate 31 more than each thermal expansion coefficient of each of the metal films 33 , 34 , 35 of the multi-layered metal film by 3 times or more, more preferably by 4 times or more is further preferred because the cracks 37 relative to the multi-layered metal film, i.e., the cracks 37 relative to the first metal film 33 , the second metal film 34 and the third metal film 35 can be formed at the same place in a more reliable fashion such that the fine multi-layered metal regions 36 separated and isolated with the cracks 37 can be more reliably formed, and the appearance and properties of an island-like metal film can be uniformized, and the top coat layer 38 described below entering into the cracks 37 can be reliably brought into contact with the base coat layer 32 and the substrate 31 .
- the thermal expansion coefficient of the substrate 31 is preferably larger than each thermal expansion coefficient of each of the metal films 33 , 34 , 35 or the thermal expansion coefficient of the first metal film 33 , and the thermal expansion coefficient of the substrate 31 is preferably 3 times or more, more preferably 4 times or more than each thermal expansion coefficient of each of the metal films 33 , 34 , 35 such that the fine multi-layered metal regions 36 separated with the cracks 37 can be reliably formed.
- the top coat layer 38 with translucency is formed to cover the fine multi-layered metal regions 36 of the island-like metal film and enter into the cracks 37 to make contact with the base coat layer 32 or the substrate 31 .
- the top coat layer 38 is formed as in the top coat layers 16 , 27 according to the first and second embodiments to cover each of the fine multi-layered metal regions 36 and enter into the crack 37 to closely adhere to the base coat layer 32 or the substrate 31 .
- the method of manufacturing a bright surface product according to the third embodiment similar effects as in the second embodiment can be achieved based on the configuration corresponding to the second embodiment. Further, the diversification of the texture of surface brightness, the properties of an island-like metal film and applicable bright surface products can be further achieved by configuring an island-like structures in a fine multi-layered metal region comprising the first metal layer 361 by electroless plating and two layers by electrolytic plating of the second metal layer 362 and the third metal layer 363 .
- the invention disclosed in this specification includes, in addition to configurations of respective inventions and configurations of respective embodiments, in an applicable range, a matter defined by modifying any of these partial configurations into other configurations disclosed in this specification, a matter defined by adding any of other configurations disclosed in the this specification to these partial configurations, or a matter defined into a generic concept by cancelling any of these partial configurations as long as a partial operational advantage can be obtained. Then, the following variations are also included.
- a multi-layered metal film can be integrally and discontinuously segmentalized to form a fine multi-layered metal film by utilizing the difference in internal stress of thermal stress by a heat treatment or the difference in internal stress of internal stress which remains in a state where they are removed from an electrolytic plating bath.
- the metal film 13 and the fine metal region 14 by electroless plating according to the first embodiment can be a single layer, a multi-layered metal film or a multi-layered fine metal region layered and formed by performing electroless plating multiple times.
- the first metal films 23 , 33 and the first metal layers 251 , 361 by electroless plating according to the second and third embodiments can also be a single layer, a multi-layered metal film or a multi-layered fine metal region layered and formed by performing electroless plating multiple times
- Example 1 corresponds to the first embodiment.
- ABS resin MTH2, Japan A&L Inc., Size: 130 mm ⁇ 80 mm ⁇ 3 mm; thermal expansion coefficient: 60 ⁇ 10 ⁇ 6 /° C.
- one side of the ABS resin substrate was irradiated with a mixed UV of wavelengths of 184.9 nm and 253.7 nm at an irradiation intensity of 28 mW/cm 2 for 10 minutes with an UV irradiation apparatus to form a modified layer on the surface of the ABS resin substrate.
- the thermal expansion coefficient of the ABS resin as a substrate 60 ⁇ 10 ⁇ 6 /° C. is 3 times or more of the thermal expansion coefficient of nickel: 14 ⁇ 10 ⁇ 6 /° C.
- spray coating was performed such that an acrylic silicon-urethane based thermoset clear coating (R227HF) has a film thickness of 20 ⁇ m or more, and baking was performed at 80° C. for 1 hour, and then allowed to stand for 72 hours or more at room temperature to obtain a test sample.
- the tape was lifted at one end of the adhesive cellophane tape with the hand so that the angle between the adhesive cellophane tape and the test surface became about 45 degrees. Then the tape was rapidly pulled in that direction to peel the test piece off. Next, the number of squares in which 50% or more of the coating film was exfoliated in each square was found to be 0.
- the following anti-chipping test was conducted for the test sample.
- the anti-chipping performance was measured with a gravelometer.
- the coating surface was mounted in a specified direction, and a chipping test was performed with standard stones (Macadam No. 6) at an ejection air pressure of 0.392 ⁇ 0.019 MPa, an air flow rate of 40 to 50 L/sec, a total amount used of 500 ⁇ 10 g and at room temperature.
- the sample after the test was removed, and stone wastes, dusts and the like on the coating surface were removed, and then a salt water spray test was performed for 80 hours.
- the test piece was removed after the salt water spray test, and the coating surface was washed with clean running water, and left to stand for 2 hours, and then an adhesive tape was adhered on the front side of the coating film to perform an adhesion test.
- As the adhesive tape a Nichiban adhesive cellophane tape was used. The adhesive cellophane tape was adhered so that air bubbles were not left on the coating surface. Next, the tape was lifted at one end of the adhesive cellophane tape with the hand so that the angle between the adhesive cellophane tape and the test surface became about 45 degrees. Then the tape was rapidly pulled in that direction to peel the test piece off. Peel evaluations were classified using the evaluation table shown in Table 1. As a result, the best evaluation A was obtained.
- a The number of scratches reaching the base material is 20/100 cm 2 or less, and the plating surface is less exposed.
- B The number of scratches reaching the base material is more than 20/100 cm 2 , but the plating surface is less exposed.
- C Detachment scratches of 1 mm or less are developed in the base material and the plating surface is more exposed.
- D Detachment scratches of more than 1 mm are developed in the base material, and the plating surface is more exposed.
- E A large number of detachment scratches of more than 1 mm are developed in the base material, and the plating surface is significantly more exposed.
- Example 2 corresponds to the first embodiment.
- ABS resin MTH2, Japan A&L Inc. Size: 130 mm ⁇ 80 mm ⁇ 3 mm; thermal expansion coefficient: 60 ⁇ 10 ⁇ 6 /° C.
- a coating liquid in which an acrylic resin (UTU570: Toho Kaken Manufacturing Inc.) was diluted with a solvent was spray-coated on one side of the ABS resin material, and then UV curing was performed to form a base coat layer having a thickness of 20 ⁇ m as an organic coating film.
- the substrate on which the base coat layer had been formed was immersed for 1 minute in Ace Clean A220 (Okuno Chemical Industries Co., Ltd.) under a condition of 60° C.
- the substrate was immersed in a 10% sulfuric acid aqueous solution for 1 minute under a condition of 45° C.
- the substrate in which a palladium metal as a catalyst has been adsorbed in the base coat layer was immersed for 40 seconds in an electroless palladium-phosphorus alloy plating bath having the following bath composition adjusted at 40° C. to deposit a metal film of the palladium-phosphorus alloy on the surface of the base coat layer.
- a network of cracks was formed when the ratio of the thermal expansion coefficients of the substrate and the metal plating film was 3 times or more. Subsequently, spray coating was performed such that an acrylic silicone-urethane based thermoset clear coating (R227HF) has a film thickness of 20 ⁇ m or more, and baking was performed at 80° C. for 1 hour, and then allowed to stand for 72 hours or more at room temperature to obtain a test sample.
- R227HF acrylic silicone-urethane based thermoset clear coating
- Example 1 As a result of performing a similar adhesion test as in Example 1 on this test sample, the number of squares in which 50% or more of the coating film was exfoliated in each square was 0. Further, as a result of performing a similar anti-chipping test as in Example 1 on this test sample, the best evaluation A was obtained.
- Example 3 corresponds to the second embodiment.
- ABS resin MTH2, Japan A&L Inc. Size: 130 mm ⁇ 80 mm ⁇ 3 mm; thermal expansion coefficient: 60 ⁇ 10 ⁇ 6 /° C.
- a coating liquid in which an acrylic resin (UTU570: Toho Kaken Manufacturing Inc.) was diluted with a solvent was spray-coated on one side of the ABS resin material, and then UV curing was performed to form a base coat layer having a thickness of 20 ⁇ m as an organic coating film.
- the substrate on which the base coat layer had been formed was immersed in Ace Clean A220 (Okuno Chemical Industries Co., Ltd.) for 1 minute under a condition of 60° C. to perform alkaline degreasing, and then an ultrasonic cleaning treatment was performed in a pH 2 buffer solution for 90 seconds.
- a metal plating on a metal usually shows a strong bonding strength since free electrons flow between them.
- the adhesion strength of the chromium plating on nickel in the present Example is strong. Therefore, it is integrally and discontinuously segmentalized when the network of cracks are formed.
- thermoset clear coating R227HF
- R227HF acrylic silicone-urethane based thermoset clear coating
- Example 1 As a result of performing a similar adhesion test as in Example 1 on this test sample, the number of squares in which 50% or more of the coating film was exfoliated in each square was 0. Further, as a result of performing a similar anti-chipping test as in Example 1 on this test sample, the best evaluation A was obtained.
- Example 4 corresponds to the third embodiment.
- ABS resin MTH2, Japan A&L Inc. Size: 130 mm ⁇ 80 mm ⁇ 3 mm; thermal expansion coefficient: 60 ⁇ 10 ⁇ 6 /° C.
- a coating liquid in which an acrylic resin (UTU570: Toho Kaken Manufacturing Inc.) was diluted with a solvent was spray-coated on one side of the ABS resin material, and then UV curing was performed to form a base coat layer having a thickness of 20 ⁇ m as an organic coating film.
- the substrate on which the base coat layer had been formed was immersed in Ace Clean A220 (Okuno Chemical Industries Co., Ltd.) for 1 minute under a condition of 60° C. to perform alkaline degreasing, and then an ultrasonic cleaning treatment was performed in a pH 2 buffer solution for 90 seconds.
- copper electrolytic plating was performed in a copper sulfate plating solution at a temperature of 20° C. and a current density of 1 A/dm 2 to laminate and deposit a copper film having a thickness of 100 nm on the first metal film as a second metal film.
- electrolytic plating was performed in the following sargent bath for 30 seconds under the conditions of a temperature of 50° C. and a current density of 30 A/dm 2 to laminate and deposit a decorative chromium film having a thickness of 60 nm on the second metal film as a third metal film.
- thermoset clear coating R227HF
- Example 1 As a result of performing a similar adhesion test as in Example 1 on this test sample, the number of squares in which 50% or more of the coating film was exfoliated in each square was 0. Further, as a result of performing a similar anti-chipping test as in Example 1 on this test sample, the best evaluation A was obtained.
- the present invention can be used to manufacture a bright surface product as an automotive part having stress resistance against collisional external force, for example, such as a front grille, a bumper mall and a wheel cover.
Abstract
Description
- Patent Literature 1: Japanese Patent Application Laid-Open No. H11-131213
TABLE 1 | |
A | The number of scratches reaching the base material is |
20/100 cm2 or less, and the plating surface is less exposed. | |
B | The number of scratches reaching the base material is |
more than 20/100 cm2, but the plating surface is less exposed. | |
C | Detachment scratches of 1 mm or less are developed in |
the base material and the plating surface is more exposed. | |
D | Detachment scratches of more than 1 mm are developed in |
the base material, and the plating surface is more exposed. | |
E | A large number of detachment scratches of more than 1 |
mm are developed in the base material, and the plating | |
surface is significantly more exposed. | |
- 11, 21, 31 Substrate
- 12, 22, 32 Base coat layer
- 13 Metal film
- 23, 33 First metal film
- 24, 34 Second metal film
- 35 Third metal film
- 14 Fine metal region
- 25, 36 Fine multi-layered metal region
- 251, 361 First metal layer
- 252, 362 Second metal layer
- 363 Third metal layer
- 15, 26, 37 Crack
- 16, 27, 38 Top coat layer
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JP2012-202253 | 2012-09-14 | ||
JP2012202253A JP5993676B2 (en) | 2012-09-14 | 2012-09-14 | Method for producing surface glitter product |
PCT/JP2013/005297 WO2014041777A1 (en) | 2012-09-14 | 2013-09-06 | Method for manufacturing product with bright surface |
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US11466367B2 true US11466367B2 (en) | 2022-10-11 |
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WO2015159467A1 (en) | 2014-04-15 | 2015-10-22 | Jfeスチール株式会社 | Stainless-steel foil for separator of polymer electrolyte fuel cell |
JP2016175348A (en) * | 2015-03-20 | 2016-10-06 | 日本写真印刷株式会社 | Matted metallic tone decorative sheet, and method for producing the same |
US10516174B2 (en) | 2015-08-12 | 2019-12-24 | Jfe Steel Corporation | Metal sheet for separators of polymer electrolyte fuel cells, and metal sheet for manufacturing the same |
US11230777B2 (en) | 2019-06-20 | 2022-01-25 | Hamilton Sundstrand Corporation | Wear-resistant coating |
CN113212323A (en) * | 2021-06-10 | 2021-08-06 | 上汽通用五菱汽车股份有限公司 | Grid sky-scattering star structure and processing method thereof |
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JP5993676B2 (en) | 2016-09-14 |
JP2014054813A (en) | 2014-03-27 |
EP2896499A1 (en) | 2015-07-22 |
US20150218703A1 (en) | 2015-08-06 |
EP2896499B1 (en) | 2018-10-24 |
EP2896499A4 (en) | 2016-05-11 |
CN104718068B (en) | 2016-10-26 |
WO2014041777A1 (en) | 2014-03-20 |
KR102051964B1 (en) | 2019-12-04 |
CN104718068A (en) | 2015-06-17 |
KR20150054903A (en) | 2015-05-20 |
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